[ANSI PH4]
Contributors: National Association of Photographic Manufacturers, Inc
Publisher: American National Standards Institute
Published: 1960
Place of publication: New York, N.Y. (1430 Broadway, New York, N.Y. 10018)
Language: eng
Subjects: Photography; Processing; Quality control
Notes: "Secretariat, National Association of Photographic Manufacturers, Inc."

Also contains revisions of ANSI PH4.32-1974 (1980); ANSI PH4.21-1958 (R1970, 1979); ANSI PH4.10-1953 (R1970, 1977).
Table of contents: title: PH4.8-1978. American national standard methylene blue method for measuring thiosulfate and silver densitometric method for measuring residual chemicals in films, plates, and papers.